Structural frame



FIG. 1 is a front elevational view thereof, with a rear elevational view being a mirror image of FIG. 1;

FIG. 2 is a right side elevational view thereof, with a left side elevational view being a mirror image of FIG. 2;

FIG. 3 is a top view thereof, with a bottom view being a mirror image of FIG. 3; and,

FIG. 4 is a front, top perspective view, with a rear, bottom perspective view being a mirror image of FIG. 4. 

CLAIM The ornamental design of a structural frame, as shown and described. 